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Open AccessArticle

Assessment of Rainfall Kinetic-Energy–Intensity Relationships

1
DICEA, Dipartimento di Ingegneria Civile, Edile e Ambientale, Università degli Studi di Roma, La Sapienza, 00184 Rome, Italy
2
Department of Earth Sciences, Uppsala University, 75236 Uppsala, Sweden
3
Centre of Natural Hazards and Disaster Science, CNDS, 75236 Uppsala, Sweden
*
Author to whom correspondence should be addressed.
Water 2019, 11(10), 1994; https://doi.org/10.3390/w11101994
Received: 1 September 2019 / Revised: 19 September 2019 / Accepted: 21 September 2019 / Published: 25 September 2019
(This article belongs to the Section Hydrology and Hydrogeology)
Raindrop-impact-induced erosion starts when detachment of soil particles from the surface results from an expenditure of raindrop energy. Hence, rain kinetic energy is a widely used indicator of the potential ability of rain to detach soil. Although it is widely recognized that knowledge of rain kinetic energy plays a fundamental role in soil erosion studies, its direct evaluation is not straightforward. Commonly, this issue is overcome through indirect estimation using another widely measured hydrological variable, namely, rainfall intensity. However, it has been challenging to establish the best expression to relate kinetic energy to rainfall intensity. In this study, first, kinetic energy values were determined from measurements of an optical disdrometer. Measured kinetic energy values were then used to assess the applicability of the rainfall intensity relationship proposed for central Italy and those used in the major equations employed to estimate the mean annual soil loss, that is, the Universal Soil Loss Equation (USLE) and its two revised versions (RUSLE and RUSLE2). Then, a new theoretical relationship was developed and its performance was compared with equations found in the literature. View Full-Text
Keywords: rainfall intensity; rainfall kinetic energy; disdrometer; drop size distribution; rainfall erosivity rainfall intensity; rainfall kinetic energy; disdrometer; drop size distribution; rainfall erosivity
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MDPI and ACS Style

Mineo, C.; Ridolfi, E.; Moccia, B.; Russo, F.; Napolitano, F. Assessment of Rainfall Kinetic-Energy–Intensity Relationships. Water 2019, 11, 1994. https://doi.org/10.3390/w11101994

AMA Style

Mineo C, Ridolfi E, Moccia B, Russo F, Napolitano F. Assessment of Rainfall Kinetic-Energy–Intensity Relationships. Water. 2019; 11(10):1994. https://doi.org/10.3390/w11101994

Chicago/Turabian Style

Mineo, Claudio; Ridolfi, Elena; Moccia, Benedetta; Russo, Fabio; Napolitano, Francesco. 2019. "Assessment of Rainfall Kinetic-Energy–Intensity Relationships" Water 11, no. 10: 1994. https://doi.org/10.3390/w11101994

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